Testing mechanism.



Umani) "STATES PATENT OFFICE.

VJOHN F. OCONNOB, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. EINER, 0F

l CHICAGO,` ILLINOIS.

TESTING iirEcHANrsM.

Specigcaton of Letters Patent.

Patent-ed .lune 6, 1911.v

Applieation filed February 25, 1911. 'Serial No. 610,701.

To all wwm it may concern: l

Be it known that I, JOHN F. OCoNNon, a-citizen of the United States,residing in Chicago, in the county of Cook and State of- Illinois, haveinvented a new-and useful Improvement in Testing Mechanism, of which'the following is a specification.

My invention relates Ito improvements in testing mechanism. j

The object ofmy invention is to provide' a testing mechanism fordraftrigging of rail-- Way cars, which will be of a' simpleconstruction,iand eliicient and reliable in operation, and by means ofwhich the practical oper.-

ativeness or efficiency of a draft rigginginpreventing the shearing ofthe rivets which connect the stop members of a draft rigging with thecenter sills or frame members of a car, maybe practically' and reliablyascertained.

vpart of this specification, Figure a front elevation of a rivet sheardraft rigging test' mg apparatus embodying my invention.

Fig. 2 is a horizontal section on line 2- 2 of 'F ig. 1, thesectionline`2.'2 being also shown on Fig. 3. Fig. 3 is a. detailelevation,

partly in central, vertical section of the rivet.A

shear testing sleeves 'and .their holder block. In the drawing, 1represents an anvil bed of masonry, 2 an anvil, 3 a drop hammer,

` preferably of about 9000 pounds weight, 4

the nose or striking plate of the hammer,

the upright guides or frame-0f the drop hammer, 6 the cross head, 7 thehoisting line,

. preferably wire rope, and 8, 9, 10, 11 pulleys .for the hoisting rope,All these parts may be of any ordinary or, suitable construction.

14 represents a railway draft rigging to be tested as to itseectiveness.in cushioning blows and consequent prevention ofrivet shearing on therivets which' connect the stop members of the draft rigging with thecenter sills or frame members of the car.

15, 16. are a pair of rivetshear testing` sleeves accurately turned tofit snugly and telescopicallytogether. Each of these rivet testingsleeves 15, 16 is furnished with accurately ydrilled and'regis'teringrivet holes 17,

18,l preferably twenty in number, in which the rivets 21 accurately andsnugly fit but with sufficient looseness to enable theV rivets to beslipped'or pushed in by hand in order that they may be quickly inserted,and also to secure absolute uniformity of conditions in testing. -T herivets-21 are preferably one and a quarter inches in diameter, and eachpreferably made just long enough to pass through both ofthe testingsleeves 15, 16.

23 is an anvil block or holder for the testingsleeves.- It is furnishedwith an annular shoulder 24 against which the outer testing sleevelGabuts at its lower end, and la further annular' shonlder 25 which isspaced apartI from the lower end of thejnner test-Y 'furnished with ahead 22, and therivets are ing sleeve 15, preferably the diameter of a'yrivet, and against which stop shoulder 25 'f the inner testing sleeve 15may 'abutafter the rivets 21 connecting the testing sleeves have beensheared by `action of the drop hammer 3. The testing sleeve holder orsupplemental block 23 is preferably furnished with a guide extension 26,which lits loosely within the inner testing sleeve. 15.

27 is a metal block or plate, preferably 'two or three inchesin-thickness, which rests on top of the inner rivet shear testing sleevel5 and 2S is a similar metal plate or block which is placed on-the upperend ofy the draft rigging 14 as a striking plate for the nose 4 of thehammer 3 to engage.

The draft rigging 14 to be tested may of course be of any knownconstruction. -As i represented in the drawing, it com rises a frictionshell as a, frlction shoes as and a wedge as o and a spring Within thefriction shell. I

In operation, the rivet holes of the sleeves are first vfilled withrivets and then subjected to a blow from the drop hammer falling from aheight suiiicient to shear the rivets when 'no draft ri ging .orcushioning mechanism is interposey between the striking blocks or plates27, 28.- The draft rigging to be tested is then `inserted between theplates 27, 28 andy the increased'height .from which the hammer 3 isrequired to; drop in order to shear the rivets will repre' sent therelative eiicieney of the draft ri ging as compared'with the solid orunyieldingconnection between the hammer and the testing sleeves.

1. A testing apparats for-draft rigging, comprising in coperativecombination an anvii, a drop hammer, a pair of rivet shear testingsleeves furnished with registering rivet holes into which rivets may beslipped, and asupplemental anvil block or holder for said testingsleeves, having anannular shoulder for one of the testing sleeves toabut against, and a sto shoulder for the other testing sleeve to a utagainst in the shearing of the rivets, substantially as specified;

v2. In a testing apparatus, the combinationV with an anvil-and drophammer, of a. pair of rivet shear testing sleeves between .the hammerand anvil and furnished with rivet holes, substantially as specified.

3. In a testing apparatus, the coriibinatio'n with an amil and drophammer, of a pau' of rivet shear testing sleeves furnished with rivetholes, and a holder for said testing sleeves having a pair of steppedannular shoulders and also provided with a. central extension adapted tofit within the inner testing sleeve, substantially as specified.v

- JGHN F. OCONNOR. W'itnesses:

F. SEYMOUR CLARK, M. GRACEv RAP?.

